This is where concept of network sniffing comes into play. Understanding the packet flow between two directly connected devices requires taking three perspectives:ĭetermining whether the originating router is transmitting the packet across the network mediumĭetermining whether the packet is being received on the destination routerĮxamining packets flowing across the network medium Forwarding issues require isolating the direction of the problem and understanding whether the packet is actually reaching the far end device. In such situations, performing a packet capture helps. However, in some scenarios, the show and debug commands do not yield sufficient information to isolate the problematic direction of the packet flow.
NX-OS provides a command-line interface (CLI) that assists with troubleshooting various complex issues. This chapter focuses on the various tools available on the Nexus platform that can help in troubleshooting and day-to-day operation. Proper tools and the right view of the problematic topology can quickly isolate the problem, thereby reducing large-scale network impact. When part of the problematic topology is presented, troubleshooting the network issue becomes much easier. If a network problem arises and an engineer has a topology of hundreds or thousands of devices, troubleshooting seems difficult at first glance. Troubleshooting is an art that requires both in-depth knowledge on the subject and the ability to verify operations and isolate the incorrect behavior. This chapter covers the following topics:
0 kommentar(er)
